Q. No.The process of guttation takes place
1. When the root pressure is high and the rate of transpiration is low
2. When the root pressure is low and the rate of transpiration is high
3. When the root pressure equals the rate of transpiration
4. When the root pressure as well as rate of transpiration are high
1. When the root pressure is high and the rate of transpiration is low
2. When the root pressure is low and the rate of transpiration is high
3. When the root pressure equals the rate of transpiration
4. When the root pressure as well as rate of transpiration are high
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When a plant undergoes senescence, the nutrients may be
1. Exported
2. Withdrawn
3. Translocated
4. None of the above
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Mycorrhiza is a symbiotic association of fungus with root system which helps in:
| A. Absorption of water | B. Mineral nutrition |
| C. Translocation | D. Gaseous exchange |
| 1. Only A | 2. Only B |
| 3. Both A and B | 4. Both B and C |
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Based on the figure given below, which of the following statement is not correct?
1. Movement of solvent molecules will take place from chamber A to B
2. Movement of solute will take place from A to B
3. Presence of a semipermeable is a prerequisite for this process to occur
4. The direction and rate of osmosis depends on both the pressure gradient and concentration gradient
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Match the following and choose the correct option:
|
A.Leaves |
i. Anti-transpirant |
|
B.Seed |
ii.Transpiration |
|
C.Roots |
iii.Negative osmotic potential |
|
D. Aspirin |
iv.Imbibition |
|
E.Plasmolyzed cell |
v.Absorption |
Options:
1. A-iii, B-iv, C-i, D-v, E-ii
2. A-ii, B-iv, C-v, D-i, E-iii
3. A-iii, B-ii, C-iv, D-v, E-i
4. A-iii, B-ii, C-i, D-iv, E-v
Mark the mismatched pair :
|
1. Amyloplast |
i. Store protein granule |
|
2. Elaioplast |
ii. Store oils or fats |
|
3.Chloroplasts |
iii. Contain chlorophyll pigments |
|
4. Chromoplasts |
iv. Contain coloured pigments other than chlorophyll |
Electron transport chain in mitochondria uses the reduction energy of NADH to move protons across the inner mitochondrial membrane against their concentration gradient. This is an example of:
1. Facilitated diffusion
2. Forward osmosis
3. Primary active transport
4. Secondary active transport
Identify the incorrect statement regarding aquaporins:
1. Water channels are transmembrane proteins made up of eight different types of aquaporins.
2. Water moves most rapidly in tissues that have aquaporin water channels.
3. The presence of water channels increases membrane permeability to water.
4. Aquaporins selectively conduct water molecules in and out of the cell but allow some passage of protons.
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Consider the following:
I. Gravitational water
II. Capillary water
III. Hygroscopic water
Which of the above soil waters is/are readily available for plants to use?
1. Only I
2. Only II
3. Both II and III
4. Both I and III
All the following are true regarding pressure potential except:
1. It is based on mechanical pressure.
2. By creating this pressure, the plant can maintain turgor, which allows the plant to keep its rigidity.
3. The pressure potential in a plant cell is usually negative.
4. In plasmolysed cells, pressure potential is almost zero.
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